180(2+3+4)×4 = 80 (degrees)
2. After a construction site used 30% cement, it shipped 10 ton, and the total cement at this time was just 3/4 of the original. How many tons of raw cement are there in this site?
After using up 30%, the rest
1-30%=70%
Then 10 ton is the original.
3-70%=5%
There was one at first.
10÷5%=200 (ton)
3. Congcong's family and Mingming's family share a faucet. There are four people in Congcong's family and five people in Mingming's family. Last month, the two households used 0/0/0.8 tons of water. According to the charge of 2.35 yuan per ton of water, how much water fee should each family share?
The total water fee is
2.35× 10.8=25.38 (yuan)
per capita
25.38(4+5)= 2.82 yuan.
Congcongjia stock
2.82×4= 1 1.28 (yuan)
Mingmingjia stock
2.82×5= 14. 1 (yuan)
A. What conditions do special post teachers need to have to apply for the exam?
Junior high school: (1) Education: Bachel